Hi User,
I recall looking at your schematic, you have diodes on RTN of each PD correct? If you didn't have diodes then yes, what you say is correct. However, if you have diodes on RTN of each PD, then the VDD-RTN voltage on PD1 should not find it's…
Hi Charles,
Thanks for clarifying. Yes, a single TPS2373-4 can be used in LLDP based UPOE. Forced UPOE can be implemented if using two TPS2373-4s in the same topology as TPS2378EVM-602.
Please see below link which goes over each of these topologies…
HI Pavan,
The current release for the bt standard is is early 2018 and yes we are working on solutions for both 60W and 90W.
For now the closest available solution is UPoE have a look at this EVM www.ti.com/.../TPS2378EVM-602
I hope this helps…
Hi Jagdish,
Since UPoE is a non standard high power PoE solution, there's no compliance testing available like Sifos test(IEEE802.3at compliance test).There are 2 kinds of UPoE solutions: Forced UPoE and LLDP. LLDP is implemented through data link…
Hi Abhijit, Have you tried putting ORing FETs on the RTN paths of each PD? Like shown on TPS2378EVM-602? This helps the PD's individually perform as if the other is not there. Or you can replace the FETs with diodes like shown in Figure 1 of SLVA625A…
Hi Patrick,
If you have a method for your PSE to turn on pairs 3 and 4, you can use a typical 25W PD solution. Like TPS23754EVM-383. I recommend taking the TPS23861EVM and using its GUI to manually turn on pairs 3 and 4 to test this.
If looking…
Hi Charlie,
I am glad to see you get all .af and .at PDs working fine with TPS23861. Regarding the high power port, I think your first approach is better. Please refer to TPS23861EVM-612( www.ti.com/.../tps23861evm-612 ) which has two high power…
Other Parts Discussed in Thread: TPS2379 , TPS2378EVM-602 Is TPS2379 compatible with the below PSE?
Microsemi PD-9001GR (30 W)
Phihong POE61U-560G (60W)
